It's a good thing '30 Rock' is nearly over - Alec Baldwin is about to be a dad again.

The 54-year-old actor's wife Hilaria Thomas is reportedly pregnant with the couple's first child - less than a year after they married in New York last June.

The last ever episode of his hit TV show '30 Rock' airs in America on Thursday, so the dad-to-be will have plenty of time to look after the tot.

Alec's rep refused to confirm or deny the claims, tweeting: "Our response to baby speculation over the past 18 months has remained the same... when/if Alec & Hilaria have news they want 2 (to) share, they will share it. Until then, no comment."

But a friend of yoga teacher Hilaria has spilled the happy news to In Touch magazine, claiming the mum-to-be is over the moon.

The source said: "They are both so excited and Alec is so in love with her.

"She says she is so in love with Alec and he tells all her friends that she is the best thing that has ever happened to him."

Alec - who has a 17-year-old daughter, Ireland, from his marriage to actress Kim Basinger - recently said he'd love to start a family with Hilaria, insisting: "I'd love that. In a sense that's a very good reason to get married."

But the fitness guru was less than happy back in August when the first round of baby bump rumours began spreading.

She raged on Twitter: "Shld (should) rumours that I'm pregnant give me a cmplx (complex) about my waistline? 1 of the biggest culprits in the eating disorder epidemic is the media.

"How slim do u (sic) have to be? This is a serious problem in society. How about this: when I'm pregnant, I'll tell you... Deal?"